describe('failing test', () => {
  const Fixture = () =>
    <div>
      <span className="foo" />
      <span className="foo bar" />
      <span className="foo bar baz" />
    </div>;

  it('fails toHaveClassName', () => {
    expect(shallow(<Fixture />).find('.bar')).not.toHaveClassName('foo');
  });

  it('fails NOT toHaveClassName', () => {
    expect(shallow(<Fixture />).find('.foo')).toHaveClassName('baz');
  });
});
